Concerns with my USPC

Today I received my H&K Full Metal USP Compact NS2 GBB Airsoft Gun By KWA in the mail. After looking over the gun I noticed some differences minor but present and am concerned with its legitimacy. When I opened the box there was no zero KWA anything, no booklet, no warranty registration info, no KWA black and blue cardboard tag, and no lubrication oil which I thought came with every KWA GBB. Then went online to check for aesthetic differences such as mines denotes the 9mmX19 on the slide which I believe is supposed to be cal 6mm BB. Also watched one disassembled on youtube and the spring under my barrel does not detach. Just trying to make sure the website isn't doing a swap and essentially stealing KWA's.

Today I received my H&K Full Metal USP Compact NS2 GBB Airsoft Gun By KWA in the mail. After looking over the gun I noticed some differences minor but present and am concerned with its legitimacy. When I opened the box there was no zero KWA anything, no booklet, no warranty registration info, no KWA black and blue cardboard tag, and no lubrication oil which I thought came with every KWA GBB. Then went online to check for aesthetic differences such as mines denotes the 9mmX19 on the slide which I believe is supposed to be cal 6mm BB. Also watched one disassembled on youtube and the spring under my barrel does not detach. Just trying to make sure the website isn't doing a swap and essentially stealing KWA's.

Post a picture. That's the easiest way to tell. We can let you know
quickly...

I bought it off of Airsoft GI. From what I can tell the only GBB USP Compact they sell is http://www.airsoftgi...roducts_id=8233 and from what I can see shouldn't it be KWA not some rebranded bs? Also it says it should have the ns2 system, how would i be able to tell? If more pictures needed let me know.